Cooled Vortex Street Generated by Cooling a Cylinder at Low Reynolds Number: Effects of Reynolds Number Difference on Cooled Wake and Cooled Vortex Street

Autor: Katsuhisa Noto
Rok vydání: 2008
Předmět:
Zdroj: Numerical Heat Transfer, Part A: Applications. 54:866-889
ISSN: 1521-0634
1040-7782
DOI: 10.1080/10407780802338918
Popis: First, the dominant action in the cooled wakes in mercury and water at the Reynolds number Re = 22 and 44 is discussed. Next, the cooled wake at Re = 22 is numerically simulated and is compared with the previous results at Re = 44. Finally, effects of Re on the cooled wake and the cooled vortex street are elucidated, and are found to be extremely powerful as follows. 1. The dominant action can be determined at different fluids and different Re. Here, the vorticity and the temperature are relating with each other. a. “Table of diffusion intensity order” is invented. By obtaining and using this table, the dominant action can be determined automatically. b. The kinds of the dominant action are the advection and the diffusion in the vorticity and the temperature. c. In mercury and water at Re = 44 and 22, the dominant action is the vorticity diffusion at the low Re, the vorticity advection at the high Re, the temperature diffusion at the low Peclet number Pe, and the temperature advection at the high Pe. d. T...
Databáze: OpenAIRE
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